This is Profan Technology Corp. Company. We are professional manufacturer in AC fan and metal balde AC fan. We have over 19 years experience in making these product and exported our products to many countries, ex.: Italy, Holland Poland , Singapore, Swiss etc. It including 4", 6", 8" ect. Our product have UL, TUV, CE certification and RoHS test report. At the same time, we have sixteen patents of Taiwan, America and China. High preasure, high airflow & low power consumption is our product feature, especially in steel blades fan.